author(s)
Ritu Kumari Pandey and DK Nayak

abstract
Present study was conducted to assess the yield loss caused by root knot nematode Meloidogyne incognita in ride gourd. Study was conducted in naturally infected plot, which was divided into two parts i.e., untreated and treated one and each plot again subdivided in 10 sub plots with size 3m x 2m size, as replication. All the treated plots were treat by Carbofuran (Furadon 3G) @ 2 kg a.i/ha before the sowing of ridge gourd seeds and it was followed by light irrigation. The experiment was ceased 100 days after sowing and the observations were recorded in both treated and untreated plots on plant growth parameters as well as on the nematode population development. Result of present study revealed that preventable yield losses due to root-knot nematode in ridge gourd was up to 74.52 percent under field conditions with application of Furadon 3G at 2 kg a.i./ha. Furthermore, there was maximum reduction in reproduction factor which was found highest decrease in replication 2 (72.72%) and least in replication 10 (26.49%).